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7049A Aluminum vs. EN 1.4724 Stainless Steel

7049A aluminum belongs to the aluminum alloys classification, while EN 1.4724 stainless steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is 7049A aluminum and the bottom bar is EN 1.4724 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
190
Elongation at Break, % 5.0 to 5.7
16
Fatigue Strength, MPa 180
170
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 27
75
Shear Strength, MPa 340 to 350
340
Tensile Strength: Ultimate (UTS), MPa 580 to 590
550
Tensile Strength: Yield (Proof), MPa 500 to 530
280

Thermal Properties

Latent Heat of Fusion, J/g 370
290
Maximum Temperature: Mechanical, °C 200
850
Melting Completion (Liquidus), °C 640
1430
Melting Onset (Solidus), °C 430
1390
Specific Heat Capacity, J/kg-K 850
490
Thermal Conductivity, W/m-K 130
21
Thermal Expansion, µm/m-K 24
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 120
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 10
7.0
Density, g/cm3 3.1
7.7
Embodied Carbon, kg CO2/kg material 8.2
2.0
Embodied Energy, MJ/kg 150
28
Embodied Water, L/kg 1100
110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 28 to 32
73
Resilience: Unit (Modulus of Resilience), kJ/m3 1800 to 1990
210
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 44
25
Strength to Weight: Axial, points 52 to 53
20
Strength to Weight: Bending, points 50 to 51
19
Thermal Diffusivity, mm2/s 50
5.6
Thermal Shock Resistance, points 25
19

Alloy Composition

Aluminum (Al), % 84.6 to 89.5
0.7 to 1.2
Carbon (C), % 0
0 to 0.12
Chromium (Cr), % 0.050 to 0.25
12 to 14
Copper (Cu), % 1.2 to 1.9
0
Iron (Fe), % 0 to 0.5
82.2 to 86.6
Magnesium (Mg), % 2.1 to 3.1
0
Manganese (Mn), % 0 to 0.5
0 to 1.0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.4
0.7 to 1.4
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0 to 0.25
0
Zinc (Zn), % 7.2 to 8.4
0
Zirconium (Zr), % 0 to 0.25
0
Residuals, % 0 to 0.15
0